Thank you you all for your advice.. I will be observing it for awhile if it reacts to more water, and have been putting the plant outside for more sunlight. I'm living in a tropical climate with temperatures hovering 28 - 30 degrees celcius and moderate to high humidity. Not sure how those factors may have an effect on the plants. Have checked the roots but I can't tell if the roots have rotted (maybe not obvious enough). Hopefully its not a root problem, I don't see how it can come back to life if thats the case. Thanks again! Thanks again!

Hi, Thank you everyone very much! To answer your questions: - Location: Melbourne, Australia - Sun: this area gets a good half a day of direct sunlight - Water/Drainage: This photo as I mentioned, was taken immediately after it rained, so it looks very wet. It is generally well protected from the rain by the leaves. Yes the rocks and sand and coal (i think perlite is another name) is ⅔ of the pot from the bottom. There are 4 big holes in the bottom of the pot and it drains really well. The plants were growing like crazy in this pot for over a year. And I replanted them 3-4 month ago, adding those rocks and sand. So the drainage issue is unlikely. The roots looked healthy. I could put some more rocks on top to protect it from the rain even more. -Plant type: don't know the name, it certainly looks just like K. luciae pictured above in Crenda's comment. There is a different succulent on the side. The very tall fast growing one. The leaves start to develop these black spots or dried edges and then bubble almost in an acid burn looking manner and die off. Should I trim those effected leaves?

I am not sure what is wrong with them and would hope someone smarter than I will come along and help out. Not sure if it's a disease or growing conditions not right. But I will tell you that these plants need a fast draining potting mix, and commercial cactus and succulent mixes are most often too water retaining. Remember these are succulents, they hold a lot of water in their leaves and suffer if they are overwatered or in soil that holds the water too long or even dries out and resists water. The best practice with succulents is to have a fast draining soil, and when the plants are dry, water until the water comes out the bottom of the pot. If you want to try to save them I would suggest mixing your cactus and succulent mix 50-50 with either perlite or pumice available at nurseries here, not sure what's available for you there. Both pots need to have holes in the bottom so you would want to replace the one without a hole. If you do a repot and notice rotting stems, the plant probably won't make it.

Thank you Rina, no offsets unfortunately, but I will try to propagate from the leaves asap.